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BOSTON MARATHON 2025

Sarah Krawczyk

Bib: 12895•F

MI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 28%
Gender (Female)
#0 / 12228
Top 11%
Division (F18-39)
#0 / 5469
Top 20%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:48/mi
24:13
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
48:13
↑ 79↓ 1380.4%
15K· 9.32 mi
7:29/mi
1:11:29
↑ 67↓ 78
20K· 12.43 mi
7:24/mi
1:34:29
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:39:29
↑ 19↓ 370.5%
25K· 15.53 mi
7:13/mi
1:57:00
↑ 66↓ 880.2%
30K· 18.64 mi
7:22/mi
2:19:53
↑ 181↓ 1480.2%
20M
7:19/mi
2:29:50
↑ 64↓ 500.2%
21M
7:40/mi
2:37:30
↑ 106↓ 241.6%
35K· 21.75 mi
6:54/mi
2:42:40
↑ 17↓ 861.7%
23M
7:06/mi
2:51:33
↑ 23↓ 630.6%
24M
6:52/mi
2:58:25
↓ 821.3%
40K· 24.85 mi
6:42/mi
3:04:09
↓ 200.3%
25.2M
7:18/mi
3:06:40
↑ 13↓ 160.2%
Finish· 26.22 mi
6:27/mi
3:13:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:29
Pace7:35 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:33:45
Pace7:09 /mi
📊Negative Split: 5.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1224:137:4824:13
7:48
-
10K
6.21 mi11:16:1248:137:4624:00
7:43
-0:05
15K
9.32 mi11:39:281:11:297:4023:16
7:29
-0:14
20K
12.43 mi12:02:281:34:297:3623:00
7:24
-0:05
Half
13.11 mi12:07:281:39:297:355:00
7:20
-0:04
25K
15.53 mi12:24:591:57:007:3217:31
7:13
-0:07
30K
18.64 mi12:47:522:19:537:3022:53
7:22
+0:09
20M
20.00 mi12:57:492:29:507:299:57
7:19
-0:03
21M
21.00 mi13:05:292:37:307:307:40
7:40
+0:21
35K
21.75 mi13:10:392:42:407:295:10
6:54
-0:46
23M
23.00 mi13:19:322:51:337:288:53
7:06
+0:12
24M
24.00 mi13:26:242:58:257:266:52
6:52
-0:14
40K
24.85 mi13:32:083:04:097:255:44
6:42
-0:10
25.2M
25.20 mi13:34:393:06:407:242:31
7:18
+0:36
Finish
26.22 mi13:41:133:13:147:236:34
6:27
-0:51

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:27 /mi

Average Pace

7:23 /mi

Slowest Pace

7:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:13

17% of race

Time at Steady Pace

1:44:08

54% of race

Time at Slower Pace

55:53

29% of race

Average Pace: 7:22 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:52:1224:137:4824:13
7:48
#14762
10K
6.21 mi11:16:1248:137:4624:00
7:43
#14423
15K
9.32 mi11:39:281:11:297:4023:16
7:29
#13487
20K
12.43 mi12:02:281:34:297:3623:00
7:24
#12510
Half
13.11 mi12:07:281:39:297:355:00
7:20
#12393
25K
15.53 mi12:24:591:57:007:3217:31
7:13
#11610
30K
18.64 mi12:47:522:19:537:3022:53
7:22
#10622
20M
20.00 mi12:57:492:29:507:299:57
7:19
#10167
21M
21.00 mi13:05:292:37:307:307:40
7:40
#9797
35K
21.75 mi13:10:392:42:407:295:10
6:54
#9569
23M
23.00 mi13:19:322:51:337:288:53
7:06
#9134
24M
24.00 mi13:26:242:58:257:266:52
6:52
#8837
40K
24.85 mi13:32:083:04:097:255:44
6:42
#8449
25.2M
25.20 mi13:34:393:06:407:242:31
7:18
#8289
Finish
26.22 mi13:41:133:13:147:236:34
6:27
#7980
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi147624383438311676(Top 41%)2722(Top 22%)2722(Top 50%)
10K6.21 mi3.10 mi14423+3394183+2004183+20014112(Top 50%)4016(Top 33%)4016(Top 73%)
15K9.32 mi3.11 mi13487+9363680+5033680+50311676(Top 41%)2722(Top 22%)2722(Top 50%)
20K12.43 mi3.11 mi12510+9773150+5303150+5309933(Top 35%)1922(Top 16%)1922(Top 35%)
Half13.11 mi0.68 mi12393+1173091+593091+5910282(Top 36%)2062(Top 17%)2062(Top 38%)
25K15.53 mi2.42 mi11610+7832711+3802711+3807798(Top 27%)1144(Top 9%)1144(Top 21%)
30K18.64 mi3.11 mi10622+9882267+4442267+4446857(Top 24%)957(Top 8%)957(Top 17%)
20M20.00 mi1.36 mi10167+4552067+2002067+2005962(Top 21%)782(Top 6%)782(Top 14%)
21M21.00 mi1.00 mi9797+3701928+1391928+1395518(Top 19%)767(Top 6%)767(Top 14%)
35K21.75 mi0.75 mi9569+2281843+851843+854832(Top 17%)570(Top 5%)570(Top 10%)
23M23.00 mi1.25 mi9134+4351699+1441699+1444341(Top 15%)497(Top 4%)497(Top 9%)
24M24.00 mi1.00 mi8837+2971608+911608+913944(Top 14%)448(Top 4%)448(Top 8%)
40K24.85 mi0.85 mi8449+3881480+1281480+1282442(Top 9%)207(Top 2%)207(Top 4%)
25.2M25.20 mi0.35 mi8289+1601433+471433+472620(Top 9%)282(Top 2%)282(Top 5%)
Finish26.22 mi1.02 mi7980+3091342+911342+912568(Top 9%)236(Top 2%)236(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11676

Females

2722

F18-39

2722

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14112

Females

4016

F18-39

4016

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11676

Females

2722

F18-39

2722

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9933

Females

1922

F18-39

1922

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

10282

Females

2062

F18-39

2062

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7798

Females

1144

F18-39

1144

25K→30K

15.5 - 18.6 mi

Top 24%
×9story building
+181ft-148ft

Overall

6857

Females

957

F18-39

957

30K→20M

18.6 - 20.0 mi

Top 21%
×5story building
+64ft-50ft

Overall

5962

Females

782

F18-39

782

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

5518

Females

767

F18-39

767

21M→35K

21.0 - 21.8 mi

Top 17%
×7story building
+17ft-86ft

Overall

4832

Females

570

F18-39

570

35K→23M

21.8 - 23.0 mi

Top 15%
×5story building
+23ft-63ft

Overall

4341

Females

497

F18-39

497

23M→24M

23.0 - 24.0 mi

Top 14%
×6story building
+12ft-82ft

Overall

3944

Females

448

F18-39

448

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2442

Females

207

F18-39

207

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2620

Females

282

F18-39

282

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2story building
+22ft-21ft

Overall

2568

Females

236

F18-39

236

Passing Analysis

Category:
Athletes Passed
6953*
Passed By
171
Net Change
+6782
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14762
5K → 10K493154+339#14762#14423
10K → 15K9404+936#14423#13487
15K → 20K9792+977#13487#12510
20K → Half1214+117#12510#12393
Half → 25K7830+783#12393#11610
25K → 30K9891+988#11610#10622
30K → 20M4572+455#10622#10167
20M → 21M371*1+370#10167#9797
21M → 35K2280+228#9797#9569
35K → 23M4350+435#9569#9134
23M → 24M2981+297#9134#8837
24M → 40K3880+388#8837#8449
40K → 25.2M1600+160#8449#8289
25.2M → Finish3112+309#8289#7980
TOTALS6953*171+6782

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing